Web3.eth：OverflowError：Python int太大，无法转换为C ssize_t

问题描述

我试图获取各种代币合约的符号，但是对于其中一些我却遇到以下错误：

OverflowError：Python int太大，无法转换为C ssize_t

这是一个最小的可重现示例：

from web3 import Web3
import json

web3 = Web3(Web3.HTTPProvider('https://cloudflare-eth.com'))

address = '0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2'

abi = json.loads(
        '[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","type":"bool"}],"stateMutability":"nonpayable",{"constant":true,"name":"totalSupply","inputs":[{"name":"_from",{"name":"_to","name":"transferFrom","name":"decimals","type":"uint8"}],"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","name":"symbol","inputs":[{"name":"_to","name":"transfer",{"name":"_spender","name":"allowance",{"anonymous":false,"inputs":[{"indexed":true,"name":"_from",{"indexed":true,"name":"_to",{"indexed":false,"name":"_value","name":"Transfer","type":"event"},"name":"_owner","name":"_spender","name":"Approval","type":"event"}]')  # noqa: 501


symbol = web3.eth.contract(address=address,abi=abi).functions.symbol().call()

我不知道为什么会出现此错误，特别是考虑到它适用于某些合同，但不适用于其他合同。任何帮助将不胜感激！

解决方法

此特定令牌将符号返回为bytes32，因此更改符号函数的类型可解决此问题。